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Finding the Fourth Proportional to 312,758.60, 469,368.30 and 125,904.20

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Solution

The fourth proportional to 312,758.60, 469,368.30 and 125,904.20 is: 188,949.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,758.60 : 469,368.30 = 125,904.20 : x
  2. Step 2: Convert to fraction form
    312,758.60/469,368.30 = 125,904.20/x
  3. Step 3: Cross multiply
    312,758.60x = 469,368.30 × 125,904.20
  4. Step 4: Simplify right side
    312,758.60x = 59,095,440,316.86
  5. Step 5: Solve for x
    x = 59,095,440,316.86/312,758.60
  6. Step 6: Final answer
    x = 188,949.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.